Maria was tasked to determine the concentration of a Fe2(SO4)3 solution. She prepared 5 different standards of Fe2(SO4)3 using the table below as her guide. She ran the standards and the unknown solution through UV-VIS spectroscopy and recorded the absorbances of each solution.   HINT: use the dilution equation to determine the concentration of Fe2(SO4)3 in each test tube before preparing the standard curve. NOTE: No need to force the line to pass through zero. Just graph the data as is.   What is the slope of the line of the standard curve from the given data? What is the concentration of the unknown solution?

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Maria was tasked to determine the concentration of a Fe2(SO4)3 solution. She prepared 5 different standards of Fe2(SO4)3 using the table below as her guide. She ran the standards and the unknown solution through UV-VIS spectroscopy and recorded the absorbances of each solution.

 

HINT: use the dilution equation to determine the concentration of Fe2(SO4)3 in each test tube before preparing the standard curve.

NOTE: No need to force the line to pass through zero. Just graph the data as is.

 

What is the slope of the line of the standard curve from the given data?

What is the concentration of the unknown solution?

1
2
TEST TUBE
3
4
5
Blank
Unknown
solution
Volume 0.52 M
Fe₂(SO4)3
1.00 mL
2.00 mL
3.00 mL
4.00 mL
5.00 mL
0.00 mL
Volume
distilled H₂O
9.00 mL
8.00 mL
7.00 mL
6.00 mL
5.00 mL
10.00 mL
Initial
Absorbance
0.507
0.555
0.609
0.697
0.732
0.123
0.656
Corrected
Absorbance
0.384
0.432
0.486
0.574
0.609
0.533
Transcribed Image Text:1 2 TEST TUBE 3 4 5 Blank Unknown solution Volume 0.52 M Fe₂(SO4)3 1.00 mL 2.00 mL 3.00 mL 4.00 mL 5.00 mL 0.00 mL Volume distilled H₂O 9.00 mL 8.00 mL 7.00 mL 6.00 mL 5.00 mL 10.00 mL Initial Absorbance 0.507 0.555 0.609 0.697 0.732 0.123 0.656 Corrected Absorbance 0.384 0.432 0.486 0.574 0.609 0.533
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